Senior U.S. intelligence and law enforcement officials are set to give separate briefings to two sets of lawmakers Thursday in connection with the investigation into Russia’s meddling in the 2016 election.

In the first session, Deputy Attorney General Rod Rosenstein, White House Chief of Staff John Kelly, National Intelligence Director Dan Coats and FBI Director Christopher Wray will meet with House Intelligence Committee Chairman Devin Nunes and Oversight and Government Reform Chairman Trey Gowdy.

​The White House arranged those talks with the two Republican lawmakers, who want more information about an FBI informant who had contact with Trump campaign officials during the 2016 race.

Democrats complained the meeting was inappropriate and asked for an expanded session that would include the so-called Gang of Eight bipartisan group of senior members of both parties.

That request was granted, but not in place of the Nunes and Gowdy talks, and will take place a few hours after the Republican-only session.

Trump has seized on the FBI’s use of Stefan Halper to talk to three of his campaign associates as part of the Russia probe, claiming Halper was working to “spy for political reasons” in order to help Democrat Hillary Clinton win the election.

Halper is an American foreign policy scholar at Britain’s University of Cambridge, and worked as a secret informant to report on foreign affairs conversations he had with the three Trump advisers: Carter Page, Sam Clovis and George Papadopoulos. Decades ago, Halper served in three Republican U.S. administrations in various domestic policy roles.

The FBI, at the time it used Halper as an informant, was looking into Trump campaign links to Russian interests during the latter stages of the 2016 campaign, part of what eventually became special counsel Robert Mueller’s ongoing criminal investigation. Papadopoulos has pleaded guilty to lying to investigators about his contacts with Russians.

Trump has repeatedly denied any collusion between his campaign and Russia.

Russia election meddling

Last year, the U.S. intelligence community assessed that Russia carried out an influence campaign meant to disrupt the election and help Trump’s chances of winning.

After Trump earlier this week demanded the FBI and the Justice Department disclose confidential records about the use of Halper, Rosenstein and Wray agreed to Thursday’s meeting with Nunes and Gowdy to show them the information.

Trump told White House reporters he was not “undercutting” the Justice Department by making his demand for the information about Halper.

“We’re cleaning everything up. This was a terrible situation,” he said. “I want total transparency … because this issue supersedes Republicans and Democrats.”

Defense contracts

It has not been disclosed how much the FBI paid Halper. But U.S. financial records show that since 2012 Halper has had contracts with the Defense Department for more than $1 million for research and development in the social sciences and humanities, although the money did not go solely to him. He hired other academics to help with the research and prepare reports.

Trump said in another tweet, using his oft-repeated pejorative for his 2016 Democratic challenger, former U.S. Secretary of State Hillary Clinton.

Rosenstein has also asked the Justice Department’s inspector general to investigate the FBI’s use of Halper.

“If anyone did infiltrate or surveil participants in a presidential campaign for inappropriate purposes, we need to know about it and take appropriate action,” Rosenstein said.